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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4826) Admin command saveNamespace.
Date Fri, 12 Dec 2008 00:51:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4826?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12655833#action_12655833

Tsz Wo (Nicholas), SZE commented on HADOOP-4826:

- Patch cannot be applied to trunk.

- DFSClient.saveNamespace() should not be public.

- Update ClientProtocol version

- In the javadoc of FSNamesystem.saveNamespace(),
-* Change "superuser permission" to "superuser privilege"
-* Change "permission status is not superuser" to "current user is not a superuser"

- Should update forrest doc.

> Admin command saveNamespace.
> ----------------------------
>                 Key: HADOOP-4826
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4826
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>            Reporter: Konstantin Shvachko
>            Assignee: Konstantin Shvachko
>             Fix For: 0.20.0
>         Attachments: saveNamespace.patch, saveNamespace.patch
> It would be useful to have an admin command that saves current namespace.
> This command can be used before regular (planned) cluster shutdown.
> The command will save the namespace into storage directory(s) and reset the name-node
journal (edits file).
> It will also reduce name-node startup time, because edits do not need to be digest.

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